JAVA you need to have a Japanese IP address, so you would need to pay for a VPN because proxies don't work. To play SEA AVA:
Go to: PLAYFPS.com : EVERYONE CAN SHOOT : Best FPS E-Sport Online Game Website
Beside the "Game Start" button there is an image that tells you where to sign up. Click on that.
All you need to put in the sign up is your e-mail address and your created password.
You'll get an email so that you verify your account. I recommend using Gmail or Yahoo.
To download go to this link: A.V.A - Playpark
Download from the SG/MY server. Then download the Game Launcher.
If you can't play the game due to IP block, use this guy's buypasser: